Slip ons not so easy to slip off

Hello, I have a 2009 sportster 883 l and I'm trying to replace the stock pipes with cycle shacks, but I CAN'T get the stock pipes off! Please help!
I've removed all hardware. I just cant get them to slide off?
Any suggestions? I even tried a flat head and hammer, but didn't want to cause any damage. Don't seem to even budge, no matter what!
Thanks

I had the same problem with mine...I just bent the little tabs....at least its what they looked like back a little where it connected to the "header"....They bend right back if thats what you do, no harm done to them. I will get a pic and post tomorrow.

I've had that problem changing out Dresser mufflers before. If you have time you may try WD-40 or Blaster and let it sit all day or overnight. It's important that your pulling them in the exact direction that doesnt have them 'in a bind'. My salvation was two late teenage sons available who both work out a lot! Good luck!

I just changed my out sunday the first 1 I beat the heck out oit and could not get it oof......the I got s pair of chanel lock plyer and placed them right behind the taps and twisted back and forth and it came rihgt off...good luck